DOCUMENT:Q191549 23-APR-1999 [exchange] TITLE :MIME Parts and Message Source for a Digitally Signed Message PRODUCT :Microsoft Exchange PROD/VER:WINDOWS:4.0,5.0,5.5 OPER/SYS: KEYWORDS: ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Exchange Server, versions 4.0, 5.0, 5.5 ------------------------------------------------------------------------------- SUMMARY ======= The following example describes what the MIME parts and message source will look like for a signed message. X-Mailer: Microsoft Outlook Express 4.71.0729.0 From: "Ryan LaBrie" To: "steven@somecompany.com" Subject: signed message Date: Wed, 30 Apr 1997 20:37:03 -0700 X-Priority: 3 X-MSMail-Priority: Normal MIME-Version: 1.0 Content-Type: multipart/signed; boundary="----=_NextPart_000_01BC55A9.8FA8A740"; micalg=sha1; protocol=application/x-pkcs7-signature X-MimeOLE: Produced By Microsoft MimeOLE Engine V4.71.0728.0 NOTE - This is a multi-part message in MIME format. ------=_NextPart_000_01BC55A9.8FA8A740 Content-Type: multipart/alternative; boundary="----=_NextPart_001_01BC55A9.8FAA2DE0" ------=_NextPart_001_01BC55A9.8FAA2DE0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable NOTE - This is a clear signed message. ------=_NextPart_001_01BC55A9.8FAA2DE0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

This is a clear signed message = hopefully...

------=_NextPart_001_01BC55A9.8FAA2DE0-- ------=_NextPart_000_01BC55A9.8FA8A740 Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" MIIGTAYJKoZIhvcNAQcCoIIGPTCCBjkCAQExCzAJBgUrDgMCGgUAMAsGCSqGSIb3DQEHAaCC BTsw ggU3MIIEoKADAgECAhBO9j8bsMhfLRsKSiktdU5hMA0GCSqGSIb3DQEBBAUAMGIxETAPBgNV BAcT CEludGVybmV0MRcwFQYDVQQKEw5WZXJpU2lnbiwgSW5jLjE0MDIGA1UECxMrVmVyaVNpZ24g Q2xh c3MgMSBDQSAtIEluZGl2aWR1YWwgU3Vic2NyaWJlcjAeFw05NzAyMjAwMDAwMDBaFw05ODAy MjAy . (lots of content deleted) ------=_NextPart_000_01BC55A9.8FA8A740-- The last part of the message is the signed hash of the message and is sent using the content-transfer-encoding type of Base64 which will allow the transmission of 8-bit data encoded in a 7-bit format. Hence, it is quite unreadable. This part of the message is listed as an attachment with the filename smime.p7s. Mail clients that are not S/MIME aware will display this file as an attachment. If the message is received by an S/MIME aware client, there will not be a visible attachment. In addition, in the above message, the certificate was included and would be available for importing into the Windows Address Book. ====================================================================== Keywords : Technology : kbExchangeSearch kbExchange500 kbExchange550 kbExchange400 kbZNotKeyword2 Version : WINDOWS:4.0,5.0,5.5 Issue type : kbhowto kbinfo ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 1999.